Brief Communications

Nature 425, 679 (16 October 2003) | doi:10.1038/425679a

Evolution: Single-gene speciation by left–right reversal

Rei Ueshima1,3 & Takahiro Asami3,2

A single gene gives rise to the mirror-image form of a snail's body plan, which could become established as a different species if mating is prevented between snails of different chirality by genital mismatch1, 2, 3. Here we use molecular phylogeny to demonstrate the parallel evolution of reversal between left and right lineages of the Japanese land snail Euhadra. We find that the different mirror-image forms have evolved in favour of the genetically dominant handedness as a result of single-gene speciation.

  1. Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
  2. Department of Biology, Shinshu University, Matsumoto 360-8621, Japan
  3. PRESTO, Japan Science and Technology, Kawaguchi 332-0012, Japan

Correspondence to: Takahiro Asami3,2 Email: